M359010 -五、新型說明： 【新型所屬之技術領域】 本創作係有關一種導光元件，特別是一種應用於光學滑鼠 的導光元件。 【先前技術】M359010 - V. New description: [New technical field] This creation is about a light guiding element, especially a light guiding element applied to an optical mouse. [Prior Art]
光學滑鼠内之光學模組係由光源、光學導光結構及感測器 所組成。光源發出數道光線，經由光學導光結構，以引導光 束可聚焦至感測器上，而光源的利用效率與光束的聚焦收斂 效果，都和光學結構的設計息息相關，也因此光束最終狀態 影響感測器的靈敏度，而決定光學滑鼠定位點之正確判斷與 否。故光學導光結構深切影響光束路徑之收光品質，如何設 計良好的光學導光結構，係為達靈敏光學滑鼠及提高光源效 率的關鍵推手。 習知圖1所示為光學滑鼠之感測模組的示意圖，如圖所 示，感測模組10是設置在光學滑鼠之一下殼體50上。此感 測模組10主要由發光二極體20、CMOS影像感測元件40以 及導光元件30所組成。發光二極體20適於提供一光束22， 此光束22依序經由導光元件30之反射面32與反射面34反 射後會投射在光學滑鼠所放置的桌面60之特定區域上。接 著，光束22會被桌面60反射至導光元件30之一透鏡部36 上，而此透鏡部36會將光束22聚焦至CMOS影像感測元件 40上，以讓CMOS影像感測元件40加以辨識處理。 上述之感測模組10中，因發光二極體20所提供的光束 22需經由反射面32、34的反射才能投射至桌面60上，又， 反射面32、34無法將發光二極體20所提供的光束22匯聚成 M359010 理想的平行光，導致光束22在傳遞的過程中較容易發散，導 致杈射在CMOS影像感測元件40上的光束22能量較低。換 5之，習知感測模紐1〇的光利用率較差，且因光束發散掉， 光束的與環境的對比度不高，故光學靈敏度也因之受損。 【新型内容】 為了解決上述問題，本創作目的之一係提供一種導光元 件，藉由在光出射面兩側提供凹槽結構，將打於其上的光束 反射回導光柱體並使光束重新聚集再引導出導光元件，可有 效減少出射光束的邊緣散射光，以提高光源使用效率。 為了解決上述問題，本創作目的之一係提供一種導光元 件，可縮小聚焦光束面積，加強光束亮度，以提高光束與周 圍環境的明暗對比，故可大幅增加光學滑鼠感測器的辨識度。 為了達到上述目的，本創作一實施例之一種導光元件，應 用於光學滑鼠，包含：導光柱體，包含：第一透鏡部，用以 匯聚光源所提供之光束；光出射面，對應第一透鏡部設置； 至少兩凹槽’設置於光出射面之兩側，用以反射光束；以及 至少一光折射斜面，用以折射光束至光出射面，使光束由光 出射面射出至放置光學滑鼠之表面；及主體，設置於導光枉 體之一側，包含：凹陷部；以及第二透鏡部，對應凹陷部設 置’用以將經表面反射之光束聚焦至凹陷部内之影像感測器。 • M359010 【實施方式】 圖2a所示為本創作之一實施例導光元件之結構示意圖；圖 2b所示為本創作一實施例之導光元件内之v型凹槽另一角度結 構示意圖。請參考圖2a與圖2b，如圖所示，此導光元件係應 用於一光學滑鼠用以將一光源(圖中未示)導引至光學滑鼠放置之一 表面160上並反射聚焦至一影像感測器(圖中未示)，其中導光元件包 括一主體200與一導光柱體1〇〇。 繼續上述，本創作之導光元件之特徵在於：設置於主體2〇〇 一側 之導光柱體100包括：一第一透鏡部110，一光出射面13〇，至少兩 凹槽170 ’以及至少一光折射斜面15〇。於一實施例中，如圖&所 示’導光柱體100係傾斜設置於主體200之一側。於又一實 施例中，光折射斜面150之數量為四個光折射斜面。第一透鏡部 110 S史置於導光柱體1〇〇之一第一頂面丨2()。光出射面13〇設置於導 光柱體1〇〇之一第一底面14〇。凹槽170設置於光出射面13〇之兩 側。於一實施例中，凹槽170係呈v字型狀。光折射斜面15〇用 以將光源所提供並經由第一透鏡部11〇匯聚後之一光束，折射後由 光出射面130射出，其中光束僅能由凹槽17〇間之光出射面13〇射 出至表面160，例如一桌面；換句話說，當光束打到凹槽17〇結 構時，因結構作用使得光束反射回導光柱體1〇〇内，最後光 束被侷限在凹槽170間之光出射面13〇射出，故可減少出射光束 的邊緣散射光，有效運用出射光束，以提高光源使用效率。 接續上述說明，請繼續參閱圖2a和圖2b，主體2⑻包括一凹陷 邠210及-第二透鏡部230。凹陷部21〇言免置於主體2〇〇之一第二 頂面220且第二透鏡部230對應凹陷部21〇設置於主體2〇〇之一第 二底面240。其中第二透鏡部23〇用以將經由表φ 16〇反射之光束 聚焦至凹陷部21G内之影像感測器(圖中未示）。本創作使光束面 積縮小後而聚焦於影像_!1，可加強光束亮度，以提高光 ,M359010 束與周圍環境的明暗對比，致使影像感靡的辨識度大幅增 加。 於-實施例中，導光柱體上的凹槽170係對稱設置於光出射 面130兩側’以加強導出光出射面130間之光束的對稱性。 於本實施例中，v型凹槽丨70的v型夾角範圍可彈性地為大於〇度 至90度之銳角或直角。又於一實施例中，兩v型凹槽η。之v 型夾角係由一Θ角和一0角所組成，且其θ角和0角可相等或不 等’使光束出光更為集中，增強光束之亮度品質。此外，第二透鏡 部230係為一圓弧結構，其能使光束的聚焦於影像感測器的效果更 好，故可提高光學滑鼠之靈敏辨識度。 綜上所述’本創作之一種導光元件藉由光出射面兩側之 凹槽結構，將打於其上的光束反射回導光柱體並使光束重新 聚集再引導出導光元件，可有效減少出射光束的邊緣散射 光，以提高光源使用效率。此凹槽結構更可縮小聚焦光束面 積，加強光束亮度，以提高光束與周圍環境的明暗對比’故 可大幅增加光學滑鼠感測器的辨識度。 以上所述之實施例僅係為說明本創作之技術思想及特 點，其目的在於使熟習此項技藝之人士能夠瞭解本創作之内 容並據以實施，當不能即以之限定本創作之專利範圍’大凡 依本創作所揭示之精神所作之均等變化或修飾，仍應涵蓋在 本創作之專利範圍内。 M359010 【圖式簡單說明】 圖1所示為習知一種導光元件結構示意圖。 圖2a所示為本創作一實施例導光元件結構示意圖。 圖2b所示為本創作一實施例導光元件結構之v型凹槽另一 角度示意圖。 .M359010 【主要元件符號說明】 10 感測模組 20 發光二極體 22 光束 30 導光元件 32,34 反射面 36 透鏡部 40 CMOS影像感測元件The optical module in the optical mouse consists of a light source, an optical light guiding structure and a sensor. The light source emits several rays of light through the optical light guiding structure to guide the light beam to be focused on the sensor, and the utilization efficiency of the light source and the focus convergence effect of the light beam are closely related to the design of the optical structure, and thus the final state of the light beam is affected. The sensitivity of the detector determines the correct judgment of the optical mouse positioning point. Therefore, the optical light guiding structure deeply affects the light-receiving quality of the beam path, and how to design a good optical light guiding structure is a key driver for the sensitive optical mouse and improving the efficiency of the light source. A schematic diagram of a sensing module for an optical mouse is shown in FIG. 1. As shown, the sensing module 10 is disposed on a lower housing 50 of an optical mouse. The sensing module 10 is mainly composed of a light emitting diode 20, a CMOS image sensing element 40, and a light guiding element 30. The light-emitting diode 20 is adapted to provide a light beam 22 which, in turn, is reflected by the reflective surface 32 of the light-guiding element 30 and the reflective surface 34 and then projected onto a particular area of the table top 60 on which the optical mouse is placed. Then, the light beam 22 is reflected by the table top 60 to one of the lens portions 36 of the light guiding element 30, and the lens portion 36 focuses the light beam 22 onto the CMOS image sensing element 40 to identify the CMOS image sensing element 40. deal with. In the above-mentioned sensing module 10, the light beam 22 provided by the light-emitting diode 20 needs to be reflected by the reflecting surfaces 32, 34 to be projected onto the table top 60. Moreover, the reflecting surfaces 32, 34 cannot pass the light-emitting diode 20 The provided beam 22 converges into M359010 ideal parallel light, causing the beam 22 to diverge more easily during transfer, resulting in lower energy of the beam 22 that is incident on the CMOS image sensing element 40. In the case of 5, the light utilization efficiency of the conventional sensing module 1〇 is poor, and since the beam is diverged, the contrast between the beam and the environment is not high, so the optical sensitivity is also impaired. [New content] In order to solve the above problems, one of the objects of the present invention is to provide a light guiding element which, by providing a groove structure on both sides of a light exiting surface, reflects the light beam hit thereon back to the light guiding cylinder and re-beams the light beam Aggregation and then guiding the light guiding element can effectively reduce the edge scattered light of the outgoing beam to improve the efficiency of the light source. In order to solve the above problems, one of the purposes of the present invention is to provide a light guiding element which can reduce the area of the focused beam and enhance the brightness of the beam to improve the contrast between the beam and the surrounding environment, thereby greatly increasing the recognition of the optical mouse sensor. . In order to achieve the above object, a light guiding element according to an embodiment of the present invention is applied to an optical mouse, comprising: a light guiding cylinder comprising: a first lens portion for collecting a light beam provided by the light source; and a light emitting surface corresponding to the first a lens portion is disposed; at least two grooves are disposed on both sides of the light exit surface for reflecting the light beam; and at least one light refraction slope is for refracting the light beam to the light exit surface, so that the light beam is emitted from the light exit surface to the placement optics a surface of the mouse; and a main body disposed on one side of the light guiding body, comprising: a concave portion; and a second lens portion corresponding to the concave portion for image sensing for focusing the surface reflected light beam into the concave portion Device. M359010 [Embodiment] FIG. 2a is a schematic view showing the structure of a light guiding element according to an embodiment of the present invention; and FIG. 2b is a schematic view showing another angle structure of a v-shaped groove in the light guiding element of the embodiment. Referring to FIG. 2a and FIG. 2b, as shown, the light guiding element is applied to an optical mouse for guiding a light source (not shown) to one surface 160 of the optical mouse and reflecting the focus. To an image sensor (not shown), the light guiding element comprises a main body 200 and a light guiding cylinder 1〇〇. Continuing the above, the light guiding element of the present invention is characterized in that: the light guiding cylinder 100 disposed on one side of the main body 2 includes: a first lens portion 110, a light emitting surface 13A, at least two grooves 170', and at least A light refracting ramp 15 〇. In one embodiment, the light guide cylinder 100 is disposed obliquely on one side of the body 200 as shown in & In yet another embodiment, the number of light refracting ramps 150 is four light refracting ramps. The first lens portion 110 S is placed on one of the first top faces 丨 2 () of the light guiding cylinder 1 。. The light exit surface 13 is disposed on one of the first bottom surfaces 14 of the light guide cylinder 1 . The grooves 170 are provided on both sides of the light exit surface 13A. In one embodiment, the recess 170 is v-shaped. The light refraction slope 15 is used to converge a light beam provided by the light source and condensed through the first lens portion 11 ,, and is refracted and emitted by the light exit surface 130, wherein the light beam can only be emitted from the light exit surface 13 between the grooves 17 Ejected to the surface 160, such as a table top; in other words, when the beam hits the groove 17〇 structure, the beam is reflected back into the column 1〇〇 due to the structural action, and finally the beam is confined to the light between the grooves 170. The exit surface 13 is emitted, so that the edge scattered light of the outgoing beam can be reduced, and the outgoing beam can be effectively utilized to improve the efficiency of use of the light source. Following the above description, please continue to refer to Figures 2a and 2b, the body 2 (8) includes a recessed 邠210 and a second lens portion 230. The recessed portion 21 is arbitrarily disposed on one of the second top surfaces 220 of the main body 2b and the second lens portion 230 is disposed on the second bottom surface 240 of the main body 2b corresponding to the recessed portion 21''. The second lens portion 23 is for focusing the light beam reflected by the table φ 16 至 into an image sensor (not shown) in the recess 21G. This creation reduces the beam area and focuses on the image _!1, which enhances the beam brightness to improve the light and M359010 beam contrast with the surrounding environment, resulting in a significant increase in the sensitivity of the image. In the embodiment, the grooves 170 on the light guiding cylinder are symmetrically disposed on both sides of the light exit surface 130 to enhance the symmetry of the light beam exiting the light exit surface 130. In the present embodiment, the v-angle range of the v-groove 70 can be elastically an acute angle or a right angle greater than the twist to 90 degrees. In still another embodiment, two v-shaped grooves η. The v-angle is composed of a corner and a zero angle, and its angle θ and angle 0 can be equal or unequal, so that the light beam is more concentrated, enhancing the brightness quality of the beam. In addition, the second lens portion 230 is a circular arc structure, which can make the effect of focusing the light beam on the image sensor better, thereby improving the sensitivity of the optical mouse. In summary, a light guiding element of the present invention is effective in reflecting the light beam struck thereon by the groove structure on both sides of the light exiting surface, and re-concentrating the light beam and guiding the light guiding element. Reduce the scattered light at the edge of the outgoing beam to improve the efficiency of the light source. This groove structure can reduce the focus beam area and enhance the beam brightness to improve the brightness contrast between the beam and the surrounding environment, thus greatly increasing the recognition of the optical mouse sensor. The embodiments described above are only for explaining the technical idea and characteristics of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present creation and implement it according to the definition, and the patent scope of the creation cannot be limited thereby. The equal changes or modifications made by Dafan in accordance with the spirit revealed by this creation should still be covered by the scope of this creation patent. M359010 [Simple Description of the Drawings] FIG. 1 is a schematic view showing the structure of a conventional light guiding element. FIG. 2a is a schematic structural view of a light guiding device according to an embodiment of the present invention. Fig. 2b is a schematic view showing another angle of the v-shaped groove of the light guiding element structure according to an embodiment of the invention. .M359010 [Description of main component symbols] 10 Sensing module 20 Light-emitting diode 22 Light beam 30 Light-guiding element 32,34 Reflecting surface 36 Lens part 40 CMOS image sensing element
50 下殼體 60 桌面 100 導光柱體 110 第一透鏡部 120 第一頂面 130 光出射面 140 第一底面 150 光折射斜面 160 表面 170 凹槽 200 主體 210 凹陷部 220 第二頂面 230 第二透鏡部 240 第二底面50 lower case 60 table top 100 light guide cylinder 110 first lens portion 120 first top surface 130 light exit surface 140 first bottom surface 150 light refraction slope 160 surface 170 groove 200 body 210 recess 220 second top surface 230 second Lens portion 240 second bottom surface